Polymorphism Principle

Polymorphism is one of the 4 main OOP principles. It's the ability to take many forms.

Compile time Polymorphism

Compile time Polymorphism occurs in function overloading.

Example of function overloading - many functions with the same name that accept different arguments:


Runtime Polymorphism

Runtime Polymorphism occurs in function overriding .

This means that the base class has a function that's being overwritten in the children classes:


The function calcArea in Figure class is overwritten by Square and Triangle classes.